WACO, Texas - Texas Tech, Kansas State, Nebraska and Oklahoma State secured first round wins at the Big 12 Women's Tennis Championship at the Baylor Tennis Center. Women's action continues on Friday with four quarterfinal contests, while men's play opens with three quarterfinal matches. Play for both begins at 9 a.m.

Sixth-seeded and 21st-ranked Texas Tech blanked 11th-seeded Iowa State, 4-0, to open the event. Elizabeth Ullathorne teamed with Haley Fournier for an 8-2 win at the No. 3 doubles spot. Samantha Adams and Kelsy Garland then notched the doubles point for the Lady Raiders with an 8-6 win at the No. 1 spot.

TTU recorded straight-set wins at the No. 2, 3 and 5 positions to secure the triumph and improve to 18-7 on the season. Adams clinched the win with a 6-4, 6-3 score at the No. 2 slot. TTU advances to play third-seeded Oklahoma at 9 a.m. on Friday. OU defeated TTU, 6-1, on March 25 in Norman.

Kansas State, who entered with a three-match Championship losing streak, topped Kansas 4-1, to improve to 16-6, a school record for wins in a season. Sophomore tandem Ana Gomez Aleman and Carmen Borau Ramos tallied an 8-6 decision over Monica Pezzotti and Paulina Los at No. 3 doubles to open competition.

After KU earned the No. 1 doubles win, Karla Boniac and Petra Chuda picked up the deciding victory, an 8-5 decision at the No. 2 slot, to give the Wildcats the doubles point. KSU secured two-set wins at the No. 2 and 3 spots in singles action, while Petra Niedermayerova improved to 7-1 over ranked opponents with a 3-6, 6-1, 6-0 triumph over 109th-ranked Katerina Morozova at the No. 1 spot to give K-State the win. KSU meets second-seeded and 25th-ranked Texas at noon in the quarterfinals.

The fifth-seeded Huskers downed 12th-seeded Colorado 4-0 to improve to 20-6 on the 2011 campaign. NU made quick work in doubles action with an 8-0 win at the No. 3 slot and an 8-3 victory at the No. 1 position. Steffi Weinstein secured a 6-1, 6-1 victory at the No. 3 spot followed by a 6-1, 6-0 win by Patricia Veresova at the No. 2 position. Maike Zeppernick sealed the Husker win with a 6-0, 6-2 triumph at the No. 6 position. Fourth-seeded and 30th-ranked Texas A&M awaits Nebraska in the 3 p.m. quarterfinal match.

Ninth-seeded Oklahoma State out-dueled eighth-seeded Missouri in a five-hour match, 4-3, to advance. The Cowgirls swept the doubles point with wins from Nataliya Shatkovskaya and Kanyapat Narattana, 8-6 at the No. 1 spot and C.C. Sardinha and Leyla Simmons at the No. 3 spot, 9-7. MU responded by picking up three-straight singles wins at the No. 1-3 positions to go ahead 3-1. OSU answered with a 7-5, 6-2 win from Narattana at the No. 5 slot. The Cowgirls continued their rally as Sarah Meghoufel defeated Rachel Stuhlmann at the No. 6 spot, 3-6, 6-0, 6-2. Malika Rose capped the comeback with a 7-5, 6-7 (4), 6-4 win at the No. 4 spot to send OSU to the quarterfinals, where they will face top-seeded Baylor at 6 p.m.

All-session passes are available at $10 for adults and $5 for youth, while day passes are $5 for adults and $3 for youth. For continued coverage of the Big 12 Tennis Championships, visit Big12Sports.com.